package com.example.demo.config;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class GlobalInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle (HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        String datasource = request.getHeader("datasource");
        GlobalContextHolder.put(datasource);
        return HandlerInterceptor.super.preHandle(request, response, handler);
    }

    @Override
    public void postHandle (HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        HandlerInterceptor.super.postHandle(request, response, handler, modelAndView);
    }

    @Override
    public void afterCompletion (HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        GlobalContextHolder.remove();
        HandlerInterceptor.super.afterCompletion(request, response, handler, ex);
    }
}
